package com.itheima.reggie.controller;


import com.itheima.reggie.common.Result;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;


@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${reggie.path}")
    private String BasePath;

    @PostMapping("/upload")
    public Result upload(MultipartFile file){

        String name = file.getOriginalFilename();

        name =UUID.randomUUID().toString()+name.lastIndexOf(".");

        File f = new File(BasePath+name);

        if (!f.exists())
            f.mkdirs();

        try {
            file.transferTo(f);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return Result.success(name);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){

        FileInputStream fis=null;

        ServletOutputStream os=null;
        try {
             fis = new FileInputStream(new File(BasePath + name));

             os = response.getOutputStream();

            byte[] bytes = new byte[1024];

            int len;

            while ((len=fis.read(bytes))!=-1)
                os.write(bytes,0,len);

        } catch (Exception e) {
            e.printStackTrace();
        }finally {

            if (fis!=null)
            try {
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

            if (os!=null)
            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }
}
